Varistors are available at Mouser Electronics from industry leading manufacturers. Mouser is an authorized distributor for many varistor manufacturers including AVX, Bourns, EPCOS, Littelfuse, Panasonic, Schurter, TE Connectivity, Vishay & more.

A Varistor is an electronic device with a “diode-like” nonlinear current-voltage characteristic. A major function of varistors is to protect circuits against excessive transient voltages. They also conduct a great amount of current when voltage is excessive. The most common type of varistor is the Metal Oxide Varistor (MOV) which contains a ceramic mass of zinc oxide grains, in a matrix of other metal oxides located between two metal plates (the electrodes).